Binary wavelets Biometrics Color Color local binary pattern and wavelet descriptor Discrete wavelet transforms Discrete-wavelet-transform Extraction Face recognition Feature extraction Features extraction Image color analysis Kernel Kernel PCA Local binary pattern Local binary pattern and wavelet kernel PCA Local binary patterns Principal component analysis Principal-component analysis RKPCA algorithm Signal reconstruction Wavelet decomposition Wavelet descriptors Wavelet kernel color LBP and wavelet descriptor local binary pattern local binary pattern and wavelet kernel PCA